2.0.0-alpha.2 for 1.21

• Added Spell Resonator. (@StellarWitch7 and @enjarai)
• Added more config options. (@StellarWitch7)
• Added mana cost documentation to the book. (@enjarai)
• Added advancements. (@StellarWitch7)
• Added the basis for further inventory interaction spells. (@StellarWitch7)
• Added a trick to place an arrow in the world. (@StellarWitch7)
• Grant the guide book to every player on join. (@enjarai)
• Made spell ink drinkable. (@StellarWitch7)
• Allow Top Hat to be placed in the hat accessory slot. (@enjarai)